(Meth) Acrylic Composition Comprising Recycled Material, Method For Producing Said Composition And Use Thereof

Abstract

The present invention relates to a (meth) acrylic composition comprising recycled material, to a method for preparing the (meth) acrylic composition and to the use of such a (meth) acrylic composition. In particular, the present invention relates to a (meth) acrylic composition comprising one or more recycled materials in polymer form or monomer form or both, a method for preparing a (meth) acrylic composition and the use of such a (meth) acrylic composition. The invention also relates to a (meth) acrylic polymer composite containing or made from a (meth) acrylic composition comprising recycled material, a method for preparing such a (meth) acrylic composite, a method for preparing such a (meth) acrylic polymer composite, and a method for preparing such a (meth) acrylic polymer composite. The present invention relates to a (meth) acrylic polymer composite comprising a (meth) acrylic composition comprising recycled material or made from a (meth) acrylic composition comprising recycled material, and an object comprising such a (meth) acrylic polymer composite, the (meth) acrylic composite material contains a (meth) acrylic composition containing a recycled material or is made from a (meth) acrylic composition containing a recycled material.

Description

[Field of the Invention]

[0001] The present invention relates to a (meth)acrylic composition comprising recycled materials, a method for preparing the (meth)acrylic composition and the use of such a (meth)acrylic composition.

[0002] In particular, the present invention relates to a (meth)acrylic composition comprising one or more recycled materials, either in polymeric or monomeric form or both, a method for preparing the (meth)acrylic composition and the use of such a (meth)acrylic composition.

[0003] The present invention also relates to a (meth)acrylic polymer composite material containing a (meth)acrylic composition containing recycled materials or made from a (meth)acrylic composition containing recycled materials, a method for preparing such a (meth)acrylic composite material containing a (meth)acrylic composition containing recycled materials or made from a (meth)acrylic composition containing recycled materials, and an object containing such a (meth)acrylic composite material containing a (meth)acrylic composition containing recycled materials or made from a (meth)acrylic composition containing recycled materials.

[0004] [Technical Issues]

[0005] Many materials are reused and / or recycled to reduce waste and for reasons of durability or sustainability. This includes polymeric materials and composites.

[0006] Composite materials are macroscopic combinations of two or more immiscible materials. Composite materials consist of at least a matrix material (e.g., a polymer material) forming a continuous phase for structural cohesion and a reinforcement material with various architectures for mechanical properties.

[0007] The goal of using composite materials is to achieve properties from the composite material that could not be achieved by the individual components when used alone. Composite materials are therefore widely used in several industrial sectors, such as construction, automotive, marine or shipping, aerospace, transport, leisure, electronics and sports, especially due to their improved mechanical properties (higher tensile strength, higher tensile modulus and higher fracture toughness) and their low density compared to homogeneous materials.

[0008] The most important category, considering the volumes at the commercial industrial scale, is composites with an organic matrix, where the matrix material is usually a polymer. The main matrix or continuous phase of polymer composites is a thermoplastic polymer or a thermosetting polymer.

[0009] One way to prepare polymer composites based on thermoplastic polymers is by using a liquid polymer composition comprising monomers, usually called a “syrup.” Such a syrup is used for blending with mineral fillers or for impregnating reinforcing materials, such as fiber matrices; it is subsequently polymerized.

[0010] At the end of the use of an object or article comprising a composite material, the object or article should be easily recyclable.

[0011] There is a need for (meth)acrylic and polymer (meth)acrylic compositions that contain recycled raw materials while maintaining the same properties as (meth)acrylic and polymer (meth)acrylic compositions that do not contain any recycled raw materials. These properties include viscosity, reactivity, stability, mechanical properties, and thermomechanical properties of the liquid composition.

[0012] There is a need for (meth)acrylic compositions and polymer (meth)acrylic compositions having a reduced carbon footprint. Preferably, the carbon footprint expressed as CO2 equivalents is less than 3.5 kg / CO2 for 1 kg of the (meth)acrylic composition or polymer (meth)acrylic composition, more preferably less than 3 kg / CO2 for 1 kg of the (meth)acrylic composition or polymer (meth)acrylic composition.

[0013] There is also a need for a method for preparing (meth)acrylic compositions and polymer (meth)acrylic compositions having a reduced carbon footprint.

[0014] There is also a need to provide more sustainable (meth)acrylic compositions and polymer (meth)acrylic compositions.

[0015] There is also a need for methods of preparing (meth)acrylic composites having a reduced carbon footprint.

[0016] Another object of the present invention is to propose a method for producing polymer (meth)acrylic composites that have a reduced carbon footprint, can be recycled and contain already recycled raw materials.

[0017] [Background of the invention] Prior art

[0018] WO2013 / 056845 discloses a composite material obtained by in-situ polymerization of a thermoplastic (meth)acrylic resin. The invention discloses a polymer composite material obtained by in-situ polymerization of a thermoplastic (meth)acrylic resin and a fiber material containing long fibers, uses thereof, a method for producing such a composite material, and mechanical or structural components or articles containing such a polymer composite material. However, the document does not disclose any information regarding the use of recycled materials or carbon footprint reduction.

[0019] WO2014 / 013028 discloses a method for impregnating a fibrous substrate, a liquid (meth)acrylic syrup used in the impregnation method, a polymerization method thereof, and the resulting structured article. The liquid (meth)acrylic syrup comprises a (meth)acrylic polymer, a (meth)acrylic monomer, and at least one initiator or initiation system for initiating polymerization of the (meth)acrylic monomer. However, this document does not disclose any information regarding the use of recycled materials or the reduction of carbon footprint.

[0020] Document CN110684470 discloses a method for preparing adhesive acrylate from monomer wastewater, wherein the monomer wastewater contains recovered acrylic acid.

[0021] Document US 2001 / 087383 discloses biobased acrylic casting compositions comprising, inter alia, one or more monofunctional and polyfunctional acrylic and / or methacrylic biomonomers of plant or animal origin.

[0022] JP2000 / 319443 discloses a method for preparing a polymer-based slurry. This method uses waste polymers.

[0023] Document CN114920489 discloses a cement raw meal additive. The additive is based on or contains butyl acrylate.

[0024] None of the cited prior art discloses liquid (meth)acrylic syrups having a recycled content of at least 1 wt. % or comprising an already recycled raw material or having a reduced carbon footprint. [Summary of the Invention]

[0026] Surprisingly, it has been found that a (meth)acrylic composition MC1 allows providing compositions for the preparation of (meth)acrylic polymer compositions and (meth)acrylic composites having the same properties as (meth)acrylic compositions and polymer (meth)acrylic compositions that do not contain any recycled raw materials, while having a reduced carbon footprint.

[0027] (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycle content of at least 1% by weight, comprising:

[0028] (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and

[0029] (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer,

[0030] (b) optionally 0.01 to 5 parts by weight of a polymerization initiator,

[0031] (c) optionally between 100 ppm and 10 000 ppm of an accelerator.

[0032] It has also been surprisingly found that a (meth)acrylic composition MC1 is capable of providing a composition for preparing a (meth)acrylic polymer composition MPC1 and a (meth)acrylic polymer composite MPCM1 having the same properties as (meth)acrylic compositions and polymer (meth)acrylic compositions without any recycled raw materials, having a reduced carbon footprint, being polymerizable and, once polymerized, resulting in a recyclable composition.

[0033] (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycle content of at least 1% by weight, comprising:

[0034] (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and

[0035] (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer,

[0036] (b) 0.01 to 5 parts by weight of a polymerization initiator,

[0037] (c) between 100 ppm and 10 000 ppm of accelerator.

[0038] It has also been surprisingly found that a (meth)acrylic composition MC1 can provide a composition for preparing a (meth)acrylic polymer composition MPC1 and a (meth)acrylic polymer composite MPCM1 having the same properties as a (meth)acrylic composition and a polymer (meth)acrylic composition that do not contain any recycled raw materials, while also having a reduced carbon footprint.

[0039] (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycle content of at least 1% by weight, comprising:

[0040] (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and

[0041] (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer,

[0042] (b) 0.01 to 5 parts by weight of a polymerization initiator,

[0043] (c) between 100 ppm and 10 000 ppm of accelerator.

[0044] Surprisingly, it has been found that a method for preparing a (meth)acrylic composition MC1, which results in a composition for preparing a (meth)acrylic polymer composition MPC1 and a (meth)acrylic polymer composite MPCM1, has the same properties as a (meth)acrylic composition and a polymer (meth)acrylic composition without any recycled raw materials, while having a reduced carbon footprint, comprises the following steps:

[0045] (i) providing a (meth)acrylic polymer P1 and a (meth)acrylic monomer M1, at least one of which has a recycled content of 100%,

[0046] (ii) preparing 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycle content of at least 1% by weight by mixing components (a1) and (a2), comprising:

[0047] (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and

[0048] (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer,

[0049] (iii) providing optionally 0.01 to 5 parts by weight of a polymerization initiator,

[0050] (iv) providing an accelerator, optionally between 100 ppm and 10,000 ppm; [Detailed description of the invention]

[0052] According to a first aspect, the present invention relates to a (meth)acrylic composition MC1, comprising:

[0053] (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycle content of at least 1% by weight, comprising:

[0054] (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and

[0055] (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer,

[0056] (b) optionally 0.01 to 5 parts by weight of a polymerization initiator,

[0057] (c) optionally between 100 ppm and 10 000 ppm of an accelerator.

[0058] According to a second aspect, the present invention relates to a (meth)acrylic composition MC1 comprising:

[0059] (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycle content of at least 1% by weight, comprising:

[0060] (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and

[0061] (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer,

[0062] (b) 0.01 to 5 parts by weight of a polymerization initiator,

[0063] (c) between 100 ppm and 10 000 ppm of accelerator.

[0064] According to a third aspect, the present invention relates to a method for preparing a (meth)acrylic composition MC1, comprising the following steps:

[0065] (i) providing a (meth)acrylic polymer P1 and a (meth)acrylic monomer M1, at least one of which has a recycled content of at least 1 wt. %,

[0066] (ii) preparing 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycle content of at least 1% by weight by mixing components (a1) and (a2), comprising:

[0067] (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and

[0068] (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer,

[0069] (iii) providing optionally 0.01 to 5 parts by weight of a polymerization initiator,

[0070] (iv) providing an accelerator, optionally between 100 ppm and 10,000 ppm;

[0071] (v) Mixing components.

[0072] According to a fourth aspect, the present invention relates to a method for preparing a (meth)acrylic composition MC1, comprising the following steps:

[0073] (i) providing 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight, comprising:

[0074] (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and

[0075] (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer,

[0076] (ii) providing 0.01 to 5 parts by weight of a polymerization initiator,

[0077] (iii) providing between 100 ppm and 10 000 ppm of an accelerator,

[0078] (iv) Mixing the components.

[0079] According to a fifth aspect, the present invention relates to the use of a (meth)acrylic composition MC1 for preparing a (meth)acrylic polymer MPC1 or a (meth)acrylic polymer composite MPCM1, wherein the (meth)acrylic composition MC1 comprises:

[0080] (a) 100 parts by weight of a liquid (meth)acrylic syrup comprising:

[0081] (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and

[0082] (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer,

[0083] (b) 0.01 to 5 parts by weight of a polymerization initiator,

[0084] (c) between 100 ppm and 10 000 ppm of accelerator.

[0085] According to a sixth aspect, the present invention relates to a (meth)acrylic polymer material MPC1 or a (meth)acrylic polymer composite material MPCM1 prepared by polymerization of the (meth)acrylic composition MC1.

[0086] According to a seventh aspect, the present invention relates to a method for preparing a (meth)acrylic polymer material MPC1, the method comprising the following steps:

[0087] (i) providing a (meth)acrylic composition MC1 according to the first or second aspect,

[0088] (ii) Polymerization of the (meth)acrylic composition MC1.

[0089] According to an eighth aspect, the present invention relates to a method for preparing a (meth)acrylic polymer composite material MPCM1, the method comprising the following steps:

[0090] (i) providing a (meth)acrylic composition MC1 according to the first or second aspect,

[0091] (ii) bringing the (meth)acrylic composition MC1 into contact with the reinforcing material,

[0092] (iii) Polymerization of the (meth)acrylic composition MC1.

[0093] According to a ninth aspect, the present invention relates to a method for reducing the carbon footprint of a (meth)acrylic composition MC1, comprising the following steps:

[0094] (i) providing a (meth)acrylic polymer P1 and a (meth)acrylic monomer M1, at least one of which has a recycled content of at least 1 wt. %,

[0095] (ii) preparing 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycle content of at least 1% by weight by mixing components (a1) and (a2), comprising:

[0096] (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and

[0097] (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer,

[0098] (iii) providing optionally 0.01 to 5 parts by weight of a polymerization initiator,

[0099] (iv) providing an accelerator, optionally in an amount between 100 ppm and 10 000 ppm,

[0100] (v) Mixing components.

[0101] According to a tenth aspect, the present invention relates to the use of a (meth)acrylic composition MC1 for preparing a (meth)acrylic polymer MPC1 or a (meth)acrylic polymer composite MPCM1 having a reduced carbon footprint, the (meth)acrylic composition MC1 comprising:

[0102] (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycle content of at least 1% by weight, comprising:

[0103] (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and

[0104] (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer,

[0105] (b) 0.01 to 5 parts by weight of a polymerization initiator,

[0106] (c) between 100 ppm and 10 000 ppm of accelerator.

[0107] According to an eleventh aspect, the present invention relates to a method for reducing the carbon footprint of a (meth)acrylic polymer material MPC1, the method comprising the following steps:

[0108] (i) providing a (meth)acrylic composition MC1 according to the ninth aspect,

[0109] (ii) Polymerization of the (meth)acrylic composition MC1.

[0110] According to a twelfth aspect, the present invention relates to a method for reducing the carbon footprint of a (meth)acrylic polymer composite MPCM1, the method comprising the following steps:

[0111] (i) providing a (meth)acrylic composition MC1 according to the ninth aspect,

[0112] (ii) bringing the (meth)acrylic composition MC1 into contact with the reinforcing material,

[0113] (iii) Polymerization of the (meth)acrylic composition MC1.

[0114] According to a thirteenth aspect, the present invention relates to the use of a (meth)acrylic composition MC1 for reducing carbon footprint, the (meth)acrylic composition MC1 comprising:

[0115] (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycle content of at least 1% by weight, comprising:

[0116] (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and

[0117] (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer,

[0118] (b) 0.01 to 5 parts by weight of a polymerization initiator,

[0119] (c) between 100 ppm and 10 000 ppm of accelerator.

[0120] The term "(meth)acrylic monomer" encompasses both acrylic monomers and methacrylic monomers. Similarly, the term "(meth)acrylic polymer" encompasses not only acrylic homopolymers but also methacrylic homopolymers, acrylic copolymers, and methacrylic copolymers.

[0121] As used herein, the term "PMMA" refers to homopolymers and copolymers of methyl methacrylate (MMA). For copolymers of MMA, the weight proportion of MMA in the PMMA is at least 50 wt%.

[0122] The term "initiator" as used herein refers to a chemical species that forms a compound or intermediate compound that initiates the polymerization of a monomer that is capable of sequentially linking with a plurality of other monomers to form a polymeric compound.

[0123] As used herein, the term "polymer composite" refers to a multi-component material comprising a plurality of distinct phase domains, wherein at least one type of phase domain is a continuous phase, and wherein at least one component is a polymer.

[0124] The term "thermoplastic" as used herein refers to a polymer that, when heated, becomes liquid or becomes more liquid or less viscous and can be formed into a new shape by the application of heat and, optionally, pressure. This also applies to slightly cross-linked thermoplastic polymers that can be thermoformed when heated above their softening temperature.

[0125] As used herein, the term "recycled" refers to polymers or monomers or both that are not virgin materials. The polymer can be production scrap or from waste, more specifically polymer waste, while the monomer is regenerated through thermochemical recycling of the polymer waste. Polymer waste can be post-industrial waste or post-consumer waste. Post-consumer waste of a material refers to waste generated by consumers of substrates containing the material. Post-industrial waste refers to waste generated during the production and processing of a product and has not yet been used in the consumer market.

[0126] As used, the term "recycle content" refers to the mass proportion of a material that is derived from recycled materials.

[0127] The term "carbon footprint" as used refers to the weighted sum of greenhouse gas emissions and greenhouse gas removals of a process, a process system or a product system, expressed in CO2 equivalents.

[0128] References to ranges of x to y in this disclosure are intended to include the upper and lower limits of the range, equivalent to at least x and at most y.

[0129] Reference to a range between x and y in the present invention is intended to exclude the upper and lower limits of the range, equivalent to greater than x and less than y.

[0130] The liquid (meth)acrylic syrup (a) of the composition according to the present invention comprises (a1) (meth)acrylic polymer P1 and (a2) (meth)acrylic monomer M1, and has a recycled content of at least 1 wt. %. The at least 1 wt. % recycled content comes from the (meth)acrylic polymer P1 or the (meth)acrylic monomer M1 or both.

[0131] The liquid (meth)acrylic syrup (a) of the (meth)acrylic composition MC1 according to the present invention comprises between 1 and 50 wt% of (meth)acrylic polymer P1 and between 50 and 99 wt% of (meth)acrylic monomer M1.

[0132] Preferably, the liquid (meth)acrylic syrup (a) contains between 2% and 50% by weight of (meth)acrylic polymer P1 and between 50% and 98% by weight of (meth)acrylic monomer M1, more preferably between 2% and 40% by weight of (meth)acrylic polymer P1 and between 60% and 98% by weight of (meth)acrylic monomer M1, still more preferably between 3% and 40% by weight of (meth)acrylic polymer P1 and between 60% and 97% by weight of (meth)acrylic monomer M1, advantageously between 3% and 35% by weight of (meth)acrylic polymer P1 and between 65% and 97% by weight of (meth)acrylic monomer M1, and more advantageously between 3% and 30% by weight of (meth)acrylic polymer P1 and between 70% and 97% by weight of (meth)acrylic monomer M1.

[0133] The dynamic viscosity of the liquid (meth)acrylic syrup is in the range of 10 mPa*s to 10000 mPa*s, preferably 20 mPa*s to 7000 mPa*s, and advantageously 20 mPa*s to 5000 mPa*s, and more advantageously 20 mPa*s to 2000 mPa*s, and even more advantageously between 20 mPa*s and 1000 mPa*s. The viscosity of the syrup can be easily measured with a rheometer or a viscometer. The dynamic viscosity is measured at 25°C. If the liquid (meth)acrylic syrup has Newtonian behavior, meaning no shear thinning, the dynamic viscosity is independent of the shear in the rheometer or the moving speed in the viscometer. If the liquid composition has non-Newtonian behavior, meaning shear thinning, the dynamic viscosity is determined in 1 s at 25°C. -1 The dynamic viscosity was measured at a shear rate of 1.

[0134] Regarding the liquid (meth)acrylic syrup (a), it comprises (a1) (meth)acrylic monomer M1 and (a2) (meth)acrylic polymer P1. Once the (meth)acrylic composition MC1 has been polymerized, the (meth)acrylic monomer M1 is finally polymerized with other (meth)acrylic monomers M2 and converted into the (meth)acrylic polymer P2 comprising monomer units of the (meth)acrylic monomer M1 and other possible comonomers.

[0135] The liquid (meth)acrylic syrup of the (meth)acrylic composition MC1 according to the present invention may contain only one (meth)acrylic polymer P1, but may also contain a mixture of two, three or even more (meth)acrylic polymers P1. If a mixture of different (meth)acrylic polymers P1 is present, the difference is the composition of the individual (meth)acrylic polymers P1 or the molecular weight of the individual (meth)acrylic polymers P1, or both.

[0136] The or each (meth)acrylic polymer P1 comprised in the liquid (meth)acrylic syrup may in particular be chosen from:

[0137] Polyalkyl acrylates including alkyl acrylate homopolymers and alkyl acrylate copolymers, and

[0138] • Polyalkyl methacrylates including alkyl methacrylate homopolymers and alkyl methacrylate copolymers.

[0139] According to a preferred embodiment, the or each (meth)acrylic polymer P1 is polymethyl methacrylate (PMMA), it being understood that, as indicated above, polymethyl methacrylate (PMMA) may refer to methyl methacrylate (MMA) homopolymer or MMA copolymer.

[0140] In particular, in case the liquid (meth)acrylic syrup comprises a mixture of two or more polymethyl methacrylates P1, such a mixture may be formed by mixing at least two MMA homopolymers having different molecular weights, by mixing at least two MMA copolymers having the same monomer composition and different molecular weights, by mixing at least two MMA copolymers having different monomer compositions, or by mixing at least one MMA homopolymer and at least one MMA copolymer.

[0141] According to a first preferred embodiment, the (meth)acrylic polymer P1 is chosen from methyl methacrylate homopolymers or methyl methacrylate copolymers or mixtures thereof, methyl methacrylate advantageously representing at least 50% by weight of the or each (meth)acrylic polymer P1.

[0142] According to one embodiment of the invention, methyl methacrylate represents at least 55% by weight of the or each (meth)acrylic polymer P1.

[0143] According to another particular embodiment, the or each (meth)acrylic polymer P1 comprises at least 70% by weight, advantageously at least 80% by weight, preferably at least 90% by weight and more preferably at least 95% by weight of methyl methacrylate.

[0144] When the or each (meth)acrylic polymer P1 is a methyl methacrylate (MMA) copolymer, it may contain at least one comonomer containing at least one ethylenic unsaturation and capable of copolymerizing with methyl methacrylate. Among these comonomers, mention may be made in particular of acrylic acid and methacrylic acid, as well as alkyl (meth)acrylates, wherein the alkyl group contains from 1 to 12 carbon atoms. Alkyl (meth)acrylates are understood to be alkyl esters of acrylic acid or methacrylic acid. Examples of comonomers include methyl acrylate and ethyl (meth)acrylate, butyl (meth)acrylate or 2-ethylhexyl (meth)acrylate.

[0145] Advantageously, the or each (meth)acrylic polymer P1 is a homopolymer of methyl methacrylate or a copolymer of methyl methacrylate and an alkyl acrylate or alkyl methacrylate, wherein the alkyl group contains 1 to 12 carbon atoms, advantageously 1 to 6 carbon atoms and preferably 1 to 4 carbon atoms.

[0146] According to a first preferred embodiment, when the or each (meth)acrylic polymer P1 is a methyl methacrylate (MMA) copolymer, this methyl methacrylate (MMA) copolymer comprises from 70% to 99.9% by weight, advantageously from 80% to 99.9% by weight, preferably from 90% to 99.9% by weight and more preferably from 95% to 99.9% by weight of methyl methacrylate and from 0.1% to 30% by weight, advantageously from 0.1% to 20% by weight, preferably from 0.1% to 10% by weight and more preferably from 0.1% to 5% by weight of at least one comonomer containing at least one ethylenic unsaturation copolymerizable with methyl methacrylate. Preferably, the or each comonomer is chosen from methyl acrylate and ethyl acrylate.

[0147] In an advantageous variant of the first preferred embodiment, when the or each (meth)acrylic polymer P1 is a methyl methacrylate (MMA) copolymer, the (meth)acrylic polymer P1 is a copolymer of methyl methacrylate and an alkyl acrylate.

[0148] In a preferred variant of the first preferred embodiment, when the or each (meth)acrylic polymer P1 is a methyl methacrylate (MMA) copolymer, the (meth)acrylic polymer P1 is a copolymer of methyl methacrylate and methyl acrylate or ethyl acrylate.

[0149] According to a second preferred embodiment, when the or each (meth)acrylic polymer P1 is a methyl methacrylate (MMA) copolymer, this methyl methacrylate (MMA) copolymer comprises from 50% to 99.9% by weight, advantageously from 52% to 99.9% by weight, preferably from 53% to 99.9% by weight and more preferably from 55% to 99.9% by weight of methyl methacrylate and from 0.1% to 50% by weight, advantageously from 0.1% to 48% by weight, preferably from 0.1% to 47% by weight and more preferably from 0.1% to 45% by weight of at least one comonomer containing at least one ethylenic unsaturation copolymerizable with methyl methacrylate. Preferably, the or each comonomer is chosen from methyl acrylate, ethyl acrylate, ethyl methacrylate, propyl acrylate, propyl methacrylate, butyl acrylate or butyl methacrylate.

[0150] The weight average molecular weight (denoted as M) of the or each (meth)acrylic polymer P1 w ) is generally high and can therefore be greater than 40 000 g / mol, advantageously greater than 45 000 g / mol and preferably greater than 50 000 g / mol. The weight-average molecular weight can be measured by size exclusion chromatography (SEC).

[0151] If not crosslinked, the (meth)acrylic polymer P1 typically has a melt mass flow rate (MFR) ISO 1133-2:2011 (230°C / 3.8 kg) of between 0.1 g / 10 min and 20 g / 10 min, or a melt mass flow rate of between 0.2 g / 10 min and 18 g / 10 min, or between 0.3 g / 10 min and 16 g / 10 min or between 0.4 g / 10 min and 13 g / 10 min.

[0152] The liquid (meth)acrylic syrup of the (meth)acrylic composition MC1 according to the invention may contain only one (meth)acrylic monomer M1, but may also contain a mixture of two, three or even more (meth)acrylic monomers M1. This would be a (meth)acrylic monomer M1a, a (meth)acrylic monomer M1b, a (meth)acrylic monomer M1c, and so on.

[0153] Regardless of whether the liquid (meth)acrylic syrup comprises one or more (meth)acrylic monomers M1 , the or each (meth)acrylic monomer M1 comprises only one (meth)acrylic function per monomer.

[0154] Regarding the (meth)acrylic monomer M1, the monomer is selected from alkyl acrylic monomers, alkyl methacrylic monomers, hydroxyalkyl acrylic monomers, hydroxyalkyl methacrylic monomers, and mixtures thereof. Alkyl acrylic monomers or alkyl methacrylic monomers refer to alkyl esters of acrylic acid or methacrylic acid.

[0155] Preferably, the (meth)acrylic monomer (M1) is selected from hydroxyalkyl acrylic monomers, hydroxyalkyl methacrylic monomers, alkyl acrylic monomers, alkyl methacrylic monomers and mixtures thereof, wherein the alkyl group contains 1 to 22 linear, branched or cyclic carbons; the alkyl group preferably contains 1 to 12 linear, branched or cyclic carbons.

[0156] Advantageously, the (meth)acrylic monomer (M1) is chosen from methyl methacrylate, ethyl methacrylate, methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, n-butyl methacrylate, isobutyl methacrylate, cyclohexyl acrylate, cyclohexyl methacrylate, isobornyl acrylate, isobornyl methacrylate, hydroxyethyl acrylate and hydroxyethyl methacrylate, and mixtures thereof.

[0157] According to a preferred embodiment, at least 50% by weight, and preferably at least 60% by weight, of the (meth)acrylic monomers M1 are methyl methacrylate.

[0158] According to a first more preferred embodiment, at least 50% by weight, preferably at least 60% by weight, more preferably at least 70% by weight, advantageously at least 80% by weight and even more advantageously 90% by weight of the monomers M1 are a mixture of methyl methacrylate and optionally at least one other monomer.

[0159] According to a second more preferred embodiment, the monomer M1 is methyl methacrylate.

[0160] In a first variant of the invention, the liquid (meth)acrylic syrup comprises:

[0161] (a1) 3 to 45% by weight, and preferably 3 to 40% by weight, of a (meth)acrylic polymer P1, and

[0162] (a2) 55 to 97% by weight, and preferably 60 to 97% by weight, of the (meth)acrylic monomer M1.

[0163] In a second variant of the invention, the liquid (meth)acrylic syrup comprises:

[0164] (a1) 10 to 35 wt%, and preferably 12 to 35 wt%, and more preferably 15 to 30 wt%, and even more preferably 20 to 30 wt% of (meth)acrylic polymer P1, and

[0165] (a2) 65 to 90% by weight, and preferably 65 to 88% by weight, and more preferably 70 to 85% by weight, and even more preferably 70 to 80% by weight of the (meth)acrylic monomer M1.

[0166] In an advantageous variant, the or each (meth)acrylic polymer P1 and the or each (meth)acrylic monomer M1 of the liquid (meth)acrylic syrup comprise at least one identical (meth)acrylic unit, such a variant making it possible to optimize the solubility of the (meth)acrylic polymer P1 in the (meth)acrylic monomer M1.

[0167] Preferably, the or each (meth)acrylic polymer P1 is chosen from homopolymers of methyl methacrylate or copolymers of methyl methacrylate and methyl acrylate and copolymers of methyl methacrylate and ethyl acrylate or copolymers of methyl methacrylate and butyl acrylate or copolymers of methyl methacrylate and butyl methacrylate, each comonomer being present in the copolymer in an amount of up to 45% by weight.

[0168] Preferably, the (meth)acrylic monomer M1 is methyl methacrylate.

[0169] In a first advantageous variant, the liquid (meth)acrylic syrup comprises a (meth)acrylic polymer P1 instead of a mixture of (meth)acrylic polymers P1.

[0170] In a second advantageous variant, the liquid (meth)acrylic syrup comprises a mixture of two (meth)acrylic polymers P1.

[0171] In another advantageous variant, the liquid (meth)acrylic syrup comprises (meth)acrylic monomers M1 instead of a mixture of (meth)acrylic monomers M1.

[0172] A stabilizer or reaction inhibitor may also be present in the liquid (meth)acrylic syrup to prevent spontaneous polymerization of the (meth)acrylic monomer M1.

[0173] These stabilizers may especially be chosen from hydroquinone (HQ), hydroquinone monomethyl ether (HQME), 2,6-di-tert-butyl-4-methylphenol (BHT), 2,6-di-tert-butyl-4-methoxyphenol (Topanol O) and 2,4-dimethyl-6-tert-butylphenol (Topanol A).

[0174] These stabilizers may be present in the liquid (meth)acrylic syrup in a proportion of not more than 5 parts by weight, advantageously not more than 4 parts by weight, and preferably in a proportion of between 0.3 and 3 parts by weight per 100 parts by weight of the sum of the (meth)acrylic polymer P1 and the (meth)acrylic monomer M1.

[0175] Regarding the recycled content of at least 1 wt. %, this may come from the (meth)acrylic polymer P1 or the (meth)acrylic monomer M1 or both.The recycled content is expressed based on the sum of components (a1) and (a2) of the liquid (meth)acrylic syrup.

[0176] In a first preferred embodiment, the recycle content is at least 10% by weight.

[0177] In a second preferred embodiment, the recycle content is at least 20% by weight.

[0178] In a third preferred embodiment, the recycle content is at least 50% by weight.

[0179] In a fourth preferred embodiment, the recycle content is between 15% and 100% by weight.

[0180] In a fifth preferred embodiment, the recycle content is from 20% to 100% by weight.

[0181] In a sixth preferred embodiment, the recycle content is from 50% to 100% by weight.

[0182] In a seventh preferred embodiment, the recycle content is at least 100 wt%.

[0183] In an eighth preferred embodiment, the recycle content of the liquid (meth)acrylic syrup comes only from the (meth)acrylic polymer P1.

[0184] In a ninth preferred embodiment, the recycle content of the liquid (meth)acrylic syrup comes only from (meth)acrylic monomers M1.

[0185] In a tenth preferred embodiment, the recycle content of the liquid (meth)acrylic syrup is derived from (meth)acrylic polymer P1 and (meth)acrylic monomer M1.

[0186] In an eleventh preferred embodiment, the (meth)acrylic polymer P1 of component (a1) of the liquid (meth)acrylic syrup is only partially recycled. This means that from 1% to 50% by weight of the one or more (meth)acrylic polymers P1, there is a mixture of at least two (meth)acrylic polymers P1, one recycled and one not recycled.

[0187] In a twelfth preferred embodiment, the (meth)acrylic monomers M1 of component (a2) of the liquid (meth)acrylic syrup are only partially recycled. This means that from 50% to 99% by weight of the one or more (meth)acrylic monomers M1, there is a mixture of at least two (meth)acrylic monomers M1, one recycled and one not recycled.

[0188] The preferred embodiments may be combined in any logical combination.

[0189] The (meth)acrylic polymer P1 as recycled component originates from waste, preferably post-industrial or post-consumer waste.

[0190] The (meth)acrylic monomer M1 as a recycled component comes from the depolymerization of a (meth)acrylic polymer comprising the (meth)acrylic monomer M1. In the case where the monomer (M1) is methyl methacrylate, it is obtained by depolymerization of polymethyl methacrylate (PMMA).

[0191] The (meth)acrylic composition MC1 according to one aspect of the present invention further comprises a polymerization initiator, the function of which is to ensure the start of polymerization of the (meth)acrylic monomer M1.

[0192] The polymerization initiator may be selected from organic peroxides, peroxyesters, peroxyacetals and azo compounds.

[0193] The polymerization initiator may in particular be chosen from diacyl peroxides, peroxyesters, peroxydicarbonates, dialkyl peroxides, peroxyacetals, hydroperoxides or peroxyketals.

[0194] In one embodiment, the polymerization initiator is selected from benzoyl peroxide.

[0195] In another embodiment, the polymerization initiator is selected from the group consisting of diisobutyryl peroxide, cumyl peroxyneodecanoate, bis(3-methoxybutyl) peroxydicarbonate, 1,1,3,3-tetramethylbutyl peroxyneodecanoate, cumyl peroxyneoheptanoate, di-n-propyl peroxydicarbonate, tert-amyl peroxyneodecanoate, di-sec-butyl peroxydicarbonate, diisopropyl peroxydicarbonate, di(4-tert-butylcyclohexyl) peroxydicarbonate, di(2-ethylhexyl) peroxydicarbonate, tert-amyl peroxyneodecanoate, tert-butyl peroxyneodecanoate, di-n-butyl peroxydicarbonate, dicetyl peroxydicarbonate, di-n-butyl peroxydicarbonate, di-octyl ... Dimyristyl dicarbonate, 1,1,3,3-tetramethylbutyl peroxypivalate, tert-butyl peroxyneoheptanoate, tert-amyl peroxypivalate, tert-butyl peroxypivalate, di-(3,5,5-trimethylhexanoyl)-peroxide, dilauroyl peroxide, didecanoyl peroxide, 2,5-dimethyl-2,5-di(2-ethylhexanoylperoxy)hexane, 1,1,3,3-tetramethylbutyl peroxy-2-ethylhexanoate, tert-amyl peroxy-2-ethylhexanoate, dibenzoyl peroxide, tert-butyl peroxy-2-ethylhexanoate, tert-butyl peroxydiethylacetate, tert-butyl peroxyisobutyrate, 1,1-dimethoxy-1,1-dicarboxylic acid (tert-Butylperoxy)-3,3,5-trimethylcyclohexane, 1,1-di(tert-amylperoxy)cyclohexane, 1,1-di(tert-butylperoxy)cyclohexane, tert-amyl peroxy-2-ethylhexyl carbonate, tert-amyl peroxyacetate, tert-butyl peroxy-3,5,5-trimethylhexanoate, 2,2-di(tert-butylperoxy)butane, tert-butyl peroxyisopropyl carbonate, tert-butyl peroxy-2-ethylhexyl carbonate, tert-amyl peroxybenzoate, tert-butyl peroxyacetate, butyl 4,4-di(tert-butylperoxy)valerate, tert-butyl peroxybenzoate, di-tert-amyl peroxide, diisopropylbenzene peroxide, di- (2-tert-Butylperoxyisopropyl)benzene, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane, tert-butylperoxide, 2,5-dimethyl-2,5-di(tert-butylperoxy)hexyne-3, di-tert-butyl peroxide, 3,6,9-triethyl-3,6,9-trimethyl-1,4,7-triperoxynonane, 2,2'-azobisisobutyronitrile (AIBN), 2,2'-azobis(2-methylbutyronitrile), azobisisobutyramide, 2,2'-azobis(2,4-dimethylvaleronitrile), 1,1'-azobis(hexahydrobenzonitrile), or 4,4'-azobis(4-cyanovaleric acid).

[0196] The (meth)acrylic composition MC1 according to the present invention may include 0.01 to 5 parts by weight of a polymerization initiator.

[0197] According to a particular embodiment, the (meth)acrylic composition MC1 according to the invention comprises 0.02 to 4 parts by weight, and advantageously 0.03 to 3 parts by weight, of polymerization initiator per 100 parts by weight of liquid (meth)acrylic syrup.

[0198] What has just been described with respect to polymerization initiators is fully transferable to initiator systems, such systems consisting of a polymerization initiator and a polymerization activator or promoter.

[0199] The (meth)acrylic composition MC1 according to the present invention may further effectively contain a polymerization activator or accelerator according to certain aspects.

[0200] According to a particular embodiment, the (meth)acrylic composition according to the invention contains between 100 ppm and 10,000 ppm, advantageously between 100 ppm and 7,000 ppm and preferably between 200 ppm and 5,000 ppm of polymerization activator or accelerator per 100 parts by weight of (meth)acrylic syrup.

[0201] The present invention also relates to a method for preparing the (meth)acrylic composition MC1.

[0202] According to the present invention, the method comprises the steps of: providing the respective components and iv) mixing the components.

[0203] Step iv) of the preparation method according to the present invention is carried out by mixing all the components contained in the (meth)acrylic composition MC1. In one embodiment, it is noted that a liquid (meth)acrylic syrup is first prepared, and then a polymerization activator or accelerator is introduced into this (meth)acrylic syrup where appropriate, and finally a polymerization initiator is introduced.

[0204] This mixing can be done manually or using a mixing device.

[0205] Optionally, the mixing is carried out by stirring and lasts for a time between 1 minute and 36 hours, advantageously between 2 minutes and 24 hours, more advantageously between 3 minutes and 24 hours and preferably between 4 minutes and 24 hours.

[0206] The production process according to the invention is therefore a process which is particularly simple to implement and can be easily implemented in existing facilities dedicated to the production of (meth)acrylic compositions.

[0207] The (meth)acrylic composition MC1 comprising compounds a1) to a2) or optionally further added components has a viscosity at 23° C. between 10 mPa*s and 10 000 mPa*s.

[0208] Preferably, the (meth)acrylic composition MC1 comprising compounds a1) to a2) has a viscosity at 23° C. in the range of 50 to 10 000 mPa*s, more preferably 50 to 9000 mPa*s, still more preferably 50 to 8000 mPa*s, even still more preferably 50 to 7500 mPa*s, even still more preferably 50 to 7000 mPa*s, advantageously 50 to 6000 mPa*s, and more advantageously 50 to 5 000 mPa*s.

[0209] The method for preparing the (meth)acrylic composition MC1 according to any embodiment may optionally further comprise a filtering step of the liquid (meth)acrylic slurry having a recycle content of at least 1 wt. %. The filtering step is preferably carried out before mixing with the polymerization initiator.

[0210] In one embodiment, the reinforcement material is a fibrous matrix.

[0211] In another embodiment, the reinforcing material is a mineral filler.

[0212] In another aspect, the present invention relates to a molded part MP1 comprising a (meth)acrylic polymer composite material MPCM1.

[0213] In a first preferred embodiment, the (meth)acrylic polymer composite material MPCM1 is a fiber-reinforced (meth)acrylic polymer composite material.

[0214] In a second preferred embodiment, the (meth)acrylic polymer composite MPCM1 is a particle-reinforced (meth)acrylic polymer composite.

[0215] [method]

[0216] The weight average molecular weight can be measured by size exclusion chromatography (SEC). The column is calibrated with PMMA standards with molecular weights ranging from 402 g / mol to 1,900,000 g / mol. The average molecular weight is expressed in g / mol for the number average and weight average molecular weights, Mn and Mw, respectively. For this measurement, the concentration is 1 g / L.

[0217] The viscosity of the (meth)acrylic composition comprising at least components a1) and a2) is measured at 23° C. using a Brookfield viscometer in accordance with ISO 2555:2018 “Plastics—Resins in the liquid state or as emulsions or dispersions—Determination of apparent viscosity using a single cylinder type rotational viscometer method”.

[0218] Stability is measured using the following method. Temper an oven to 90°C. Pour 200 grams of liquid resin into a bottle. Place the sealed bottle in the oven. Check the sample regularly. A thermocouple can be used to track the temperature of the sample during the stability test. If the resin remains liquid after 24 hours at 90°C, and if no exothermic peak is observed during this time, the sample is considered "conform," meaning stable. Remaining liquid means that the viscosity does not exceed 20 Pa*s at 23°C.

[0219] Reactivity is measured using the following method: Fill a 20 x 180 mm test tube to a height of 7.5 cm with the liquid slurry and add the initiator and accelerator. Place a thermocouple in the slurry. Immerse the tube at least 140 mm in a 25°C water bath. Continuously measure the temperature, and record the time to peak temperature. [Example]

[0220] The compounds used to prepare various (meth)acrylic compositions are as follows:

[0221] - (meth)acrylic polymer P1: PMMA formed from a copolymer of methyl methacrylate and ethyl acrylate, named BS 520B, from Altuglas, abbreviated as P1-F,

[0222] - As recycled (meth)acrylic polymer P1, production waste PMMA having the same molecular weight as BS 520B (as measured by size exclusion chromatography (SEC), abbreviated as P1-R,

[0223] - as the (meth)acrylic monomer M1: methyl methacrylate stabilized with hydroquinone monomethyl ether, abbreviated as M1-F,

[0224] - as recycled (meth)acrylic monomer M1: methyl methacrylate from the company Monómeros del Vallés, abbreviated as M1-R,

[0225] - as initiator, benzoyl peroxide (BPO) was used,

[0226] As an accelerator, DMPT (N,N-dimethyl-p-toluidine) was used.

[0227] According to Table 1, four syrups were prepared by first dissolving 20 parts by weight of each (meth)acrylic polymer P1 in 80 parts by weight of each (meth)acrylic monomer M1.

[0228] Table 1 - Composition of various liquid (meth)acrylic syrup samples

[0229] Sample 1 Sample 2 Sample 3 Sample 4 P1-F 20% by weight 20% by weight P1-R 20% by weight 20% by weight M1-F 80% by weight 80% by weight M1-R 80% by weight 80% by weight Recycled content 0% by weight 20% by weight 80% by weight 100% by weight <![CDATA[Kg CO2 / kg slurry]]> 3.60 2.97 1.20 0.57

[0230] The properties of the four sample slurries are given in Table 2.

[0231] Table 2 - Properties of Liquid (Meth)Acrylic Syrups

[0232]

[0233] As can be seen from Table 2, the three samples with recycled content have the same properties as the comparative sample using (meth)acrylic polymer P1 and (meth)acrylic monomer M1 from fossil sources.

[0234] Initiators and accelerators were added to each sample: 3 parts of BPO and 4,000 ppm of DMPT were added.

[0235] Four sample syrups were polymerized to prepare (meth)acrylic polymer compositions using a cast sheet process.

[0236] Table 3 - Properties of (meth)acrylic polymer compositions obtained from polymerized liquid (meth)acrylic syrups

[0237]

[0238] Four samples were used to inject the fiber matrix and polymerize after injection. The fiber matrix accounted for 50% by volume of the obtained (meth)acrylic polymer composite. 600 g / m 2 Non-CRIMP glass fiber fabric (NCF-non-crimp fabric) was used as the fiber substrate.

[0239] The mechanical properties of the obtained polymer (meth)acrylic composites were analyzed.

[0240] The first series of measurements were performed at an angle of + / - 45° to the fiber direction. The results obtained are summarized in Table 4.

[0241] The second series of measurements was carried out at an angle of 0° / 90° towards the fiber direction. The results obtained are summarized in Table 5.

[0242] Table 4 - Properties of (meth)acrylic polymer composites obtained after injection of polymerized liquid (meth)acrylic syrup at an angle of + / - 45°

[0243]

[0244] Table 5 - Properties of (meth)acrylic polymer composites obtained after injection of polymerized liquid (meth)acrylic syrup at an angle of 0° / 90°

[0245]

[0246] Tables 4 and 5 show that there were no significant changes in any of the mechanical properties of the composites.

Claims

1. A (meth)acrylic composition MC1, comprising: (a) 100 parts by weight of a liquid (meth)acrylic syrup having a recycle content of at least 1% by weight, comprising: (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer, (b) optionally 0.01 to 5 parts by weight of a polymerization initiator, (c) optionally between 100 ppm and 10 000 ppm of an accelerator.

2. The (meth)acrylic acid composition MC1 according to claim 1, characterized in that The liquid (meth)acrylic syrup comprises: (a1) 10 to 35 wt%, and preferably 12 to 35 wt%, and more preferably 15 to 30 wt%, and even more preferably 20 to 30 wt% of (meth)acrylic polymer P1, and (a2) 65 to 90% by weight, and preferably 65 to 88% by weight, and more preferably 70 to 85% by weight, and even more preferably 70 to 80% by weight of the (meth)acrylic monomer M1.

3. The (meth)acrylic acid composition MC1 according to claim 1 or 2, characterized in that It contains (c) 0.01 to 5 parts by weight of a polymerization initiator, (d) between 100 ppm and 10 000 ppm of accelerator.

4. The (meth)acrylic acid composition MC1 according to claim 1, 2 or 3, characterized in that: The recycle content is at least 10% by weight.

5. The (meth)acrylic acid composition MC1 according to claim 1, 2 or 3, characterized in that: The recycle content is between 15% and 100% by weight.

6. The (meth)acrylic acid composition MC1 according to claim 1, 2 or 3, characterized in that: The recycle content is from 20% to 100% by weight.

7. The (meth)acrylic acid composition MC1 according to claim 1, 2 or 3, characterized in that: The recycle content is from 50% to 100% by weight.

8. The composition according to any one of claims 1 to 7, characterized in that At least 1 wt. % of the recycled content comes from the (meth)acrylic polymer P1 or the (meth)acrylic monomer M1 or both.

9. The composition according to any one of claims 1 to 7, characterized in that The (meth)acrylic monomer M1 as a recycled component is derived from the depolymerization of a (meth)acrylic polymer containing the (meth)acrylic monomer M1.

10. The composition according to any one of claims 1 to 7, characterized in that The (meth)acrylic polymer P1 as recycled component originates from waste, preferably post-industrial or post-consumer waste.

11. The composition according to any one of claims 1 to 10, characterized in that The or each (meth)acrylic polymer P1 is chosen from methyl methacrylate homopolymers or methyl methacrylate copolymers or mixtures thereof, methyl methacrylate advantageously representing at least 50% by weight of the or each (meth)acrylic polymer P1.

12. The composition according to any one of claims 1 to 10, characterized in that The or each (meth)acrylic polymer P1 comprises at least 70% by weight, advantageously at least 80% by weight, preferably at least 90% by weight and more preferably at least 95% by weight of methyl methacrylate.

13. The composition according to any one of claims 1 to 12, characterized in that The viscosity of the liquid (meth)acrylic syrup at 25° C. is between 10 m*Pas and 10 000 mPa*s.

14. The composition according to any one of claims 1 to 13, characterized in that At least 50% by weight and preferably at least 60% by weight of the one or more (meth)acrylic monomers M1 are chosen from methyl methacrylate.

15. The composition according to any one of claims 1 to 13, characterized in that At least 70% by weight, advantageously at least 80% by weight and even more advantageously 90% by weight of the monomers M1 are a mixture of methyl methacrylate and optionally at least one other monomer.

16. The composition according to any one of claims 1 to 13, characterized in that The monomer M1 is methyl methacrylate.

17. The composition according to any one of claims 1 to 16, characterized in that The weight average molecular weight M of the or each (meth)acrylic polymer P1 w Greater than 40 000 g / mol, advantageously greater than 45 000 g / mol and preferably greater than 50 000 g / mol.

18. The composition according to any one of claims 1 to 17, characterized in that The (meth)acrylic polymer P1 has a melt mass flow rate (MFR) ISO 1133-2:2011 (230°C / 3.8kg) between 0.1 g / 10 min and 20 g / 10 min, or a melt mass flow rate between 0.2 g / 10 min and 18 g / 10 min, or between 0.3 g / 10 min and 16 g / 10 min, or between 0.4 g / 10 min and 13 g / 10 min.

19. A method for preparing the (meth)acrylic composition MC1 according to any one of claims 1 to 18, comprising the following steps: (i) providing a (meth)acrylic polymer P1 and a (meth)acrylic monomer M1, at least one of which has a recycled content of 100%, (ii) preparing 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycle content of at least 1% by weight by mixing components (a1) and (a2), comprising: (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer, (iii) providing optionally 0.01 to 5 parts by weight of a polymerization initiator, (iv) providing an accelerator, optionally in an amount between 100 ppm and 10 000 ppm, (v) Mixing components.

20. A method for preparing the (meth)acrylic composition MC1 according to any one of claims 1 to 18, comprising the following steps: (i) providing 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycled content of at least 1% by weight, comprising: (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer, (ii) providing 0.01 to 5 parts by weight of a polymerization initiator, (iii) providing between 100 ppm and 10 000 ppm of an accelerator, (iv) Mixing the components.

21. The method according to any one of claims 19 or 20, characterized in that The process further comprises a filtering step of the liquid (meth)acrylic slurry having a recycle content of at least 1 wt%.

22. A method for reducing the carbon footprint of a (meth)acrylic composition MC1, comprising the following steps: (i) providing a (meth)acrylic polymer P1 and a (meth)acrylic monomer M1, at least one of which has a recycled content of at least 1 wt. %, (ii) preparing 100 parts by weight of (a) a liquid (meth)acrylic syrup having a recycle content of at least 1% by weight by mixing components (a1) and (a2), comprising: (a1) 1 to 50 wt. % of one or more (meth)acrylic polymers P1, and (a2) 50% to 99% by weight of one or more (meth)acrylic monomers M1, each monomer M1 comprising only one (meth)acrylic function per monomer, (iii) providing optionally 0.01 to 5 parts by weight of a polymerization initiator, (iv) providing an accelerator, optionally in an amount between 100 ppm and 10 000 ppm, (v) Mixing components. 23 . Use of the (meth)acrylic composition MC1 according to claim 1 for preparing a (meth)acrylic polymer material or a (meth)acrylic polymer composite material. 24 . Use of the (meth)acrylic composition MC1 according to claim 1 for reducing carbon footprint.

25. A (meth)acrylic polymer material prepared by polymerizing the (meth)acrylic composition MC1 according to any one of claims 1 to 18.

26. Use of the (meth)acrylic composition MC1 according to any one of claims 1 to 18 for preparing a (meth)acrylic polymer material MPC1 or a (meth)acrylic polymer composite material MPCM1 having a reduced carbon footprint. 27 . A (meth)acrylic polymer composite material prepared by polymerizing the (meth)acrylic composition MC1 according to claim 1 .

28. A method for preparing a (meth)acrylic polymer material, comprising the following steps: (i) providing a (meth)acrylic composition MC1 according to any one of claims 1 to 18, (ii) polymerizing the (meth)acrylic composition MC1.

29. A method for reducing the carbon footprint of a (meth)acrylic polymer material, comprising the steps of: (i) providing a (meth)acrylic composition MC1 according to any one of claims 1 to 18, (ii) polymerizing the (meth)acrylic composition MC1.

30. A method for preparing a (meth)acrylic polymer composite material MCPM1, comprising the following steps: (i) providing a (meth)acrylic composition MC1 according to any one of claims 1 to 18, (ii) bringing the (meth)acrylic composition MC1 into contact with a reinforcing material, (iii) polymerizing the (meth)acrylic composition MC1.

31. A method for reducing the carbon footprint of a (meth)acrylic polymer composite material MPCM1, the method comprising the following steps: (i) providing a (meth)acrylic composition MC1 according to any one of claims 1 to 18, (ii) bringing the (meth)acrylic composition MC1 into contact with a reinforcing material, (iii) polymerizing the (meth)acrylic composition MC1.

32. The method according to claim 30 or 31, characterized in that The reinforcing material is a fiber matrix.

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